This year’s World Breastfeeding Week was meant to raise awareness on the connection between breastfeeding and sustainable development, according to a joint statement by UNICEF Executive Director Anthony Lake and WHO Director General Margaret Chan.

“Supporting breastfeeding is one of the smartest investments countries can make in the wellbeing of their citizens — and thus, in their own long-term strength,” reads the statement.

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Public breastfeeding, however, is still considered a controversial topic in some nations. Many women posted photos of themselves breastfeeding to social media in an attempt to draw awareness to World Breastfeeding Week and to help end the stigma.